[Therion] Best approach for colouring elevations

[Tarquin Wilton-Jones]

>> And what is the problem define another maps from segments and colour them?
> 
> 
> Having to split my overall map up into yet another series of submaps,
> each of which covers an arbitrary group of maps from several unrelated
> subsections, is getting really close to spaghetti code.


I withdraw my request.

You were right, using maps I can make this very logical and "clean" (for
some value of "clean"). Each survey exports one map for each "plane" of
the elevation view. (Optionally, it can also export a combined map, in
case I want to render it separately from the other caves/surveys, such
as in an atlas.) Each parent survey exports a map for each plane used by
any of its children, containing the relevant maps from the children. At
the top level, I have the overall map which combines the plane maps. The
lookup then only needs to match those. Or they can have the colours
hardcoded.

Thanks for the hints :)

Tarquin